From: chip (Chip Atkinson)
Date: Fri, 19 Jan 1996 09:16:32 +0700
I saw a gang of 3 phase variacs for a reasonable price ($15) at the local
electronics surplus/supply place. However, the variacs are 400Hz instead
of 60Hz. Does anyone know if they will work ok for 60Hz? I thought the
main considerations with different frequencies for transformers are eddy
current losses. If that is true, wouldn't a transformer for a higher
frequency work fine for a lower one?